Press



Nov. 17, 1942.

F. E. STRATTON 2,301,982

PRESS Filed July 28, 1941 2 Sheets-Sheet 1 Fig.1 30

QLM gQ- Nov. 17, 1942. F. E. STRATTON PRESS Filed July 28, 1941 2 Sheets-Sheet 2 Patented Nov. 17, 1942 r OFFICE PRESS Frank E. Stratton, Beverly, Mass., assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application July 28, 1941, Serial No. 404,326 a 4 Claims. (01. 164-23) This invention relates to presses and is herein illustrated as embodied ina clicking machine of the type disclosed in Letters Patent of the United States No. 921,503, granted May 11, 1909, in the name of Arthur Bates.

Clicking machines of the type referred to comdue-to the fact that an operator will sometimes initiate a power operation of the presser member while it is stillmoving transversely of the bed, with the result that the die is struck a glancing blow which has a tendency to distort the die or break the cutting edges thereof. This effect is.

likely to be especially serious when using a double-edged die, in which cas a sharpened upwardly disposed edge of the die is engaged by the striking face of the presser member during its downward movement, and, if at the same time 17% the presser member has a substantial lateral movement, the engaged edge of the die is subjected to severe strains, which may deform or break it. i

.In view of the foregoing, it is an object of thepresent invention to provide, in a machine of the type referred to, improved mechanism which will be effective to arrest the lateral movement of the presser member shortly after the downward movement thereof commences, thus to make it impossible for the presser member to deliver a glancing blow to the die and consequently eliminating the difliculties mentioned.

To this end and as illustrated, the invention provides a clicking machine, in which the support for the presser member carries a brake surface which is arranged to engage a cooperating brake surface, carried by, the frame of the machine and adapted to prevent angular movement of the presser member when the two surfaces engage during downward movement of the presser member. Preferably and as shown, the mechanism comprises a frusto-conica1 member carried by a reciprocating post and arranged to engage a corresponding frusto-conical surface on a ring surrounding the post, said ring being yieldingly mounted for movement in a vertical direction, but being secured against angular movement. thereby to constitute a brake which will prevent angular movement of the post during downward movement thereof. This construction is such that even though the operator initiates power operation of the presser member, during movement of the same transversely over the cutting bed, such movement is arrested shortly after the initiation of the power operation, with the result that the presser member will move downwardly in a direction normal to the cutting bed, and consequently there is no component of force applied by the presser member which would tend to distort the cutting edges of the die in a lateral direction.

These and other features of the invention are disclosed in thefollowing specification and in the accompanying drawings, and are pointed out in the claims.

In the drawings,

Fig. 1 is a side elevation, partly in section, of a portion of a clicking machine embodying my invention;

Fig. 2 isa front elevation, partly in section, of the mechanism for arresting lateral movement of the presser member; and

Fig. 3 is a cross sectional view taken along line I1IIII of Fig. 2.

The illustrated machine comprises-a C-shaped frame 10, having at its lower portion a bed I2 carrying a cutting block l4, and a post I6 mounted for reciprocation heightwise of the frame and for movement angularly about its axis, the post having secured thereto a presser member [8 which can be swung manually across the cutting block M. The post 16 is supported by a spindle 20 which carries at its upper end a threaded sleeve 22 in engagement with the post. The

spindle is arranged to be reciprocated by means of an eccentric 24 on a drive shaft 26, which is connected to a flywheel 28 by means of a onerevolution clutch 30 operable upon depression of a starting handle 32 carried at the forward endof the presser member. Depression of the starting handleinitiates a single reciprocation of .40 of the sleeve 22.

sure of the springs 46.

one of which is a frusto-conical member 34 secured to the post [6 and arranged to be engaged by a brake ring 38 yieldably mounted upon the upper portion of the frame It).

The frusto-conical member 34 forms the lower portion of a hollow cap 38, which surrounds 'the upper end of the post [6 and rests upon a ledge Rotation of the cap relatively to the post, is prevented by means of a key 42, positioned in the wall of the cap and having a portion extending into a vertical groove 44 in the post.

The brake ring 36 is supported by two springs 45, Fig. 2, carried by a bracket 48 which surrounds the post I 6 and rests upon the upper portion of the frame Hi, being secured thereto by screws 59. The bracket 48 is provided with depending arms 52 carrying bolts 54 constituting guides for the springs 45. Each of the bolts extends through a slotted opening 56 in the depending arm -2 of a bracket and is secured'in upright position by a screw threaded plate 58 and a nut 60 threaded on thelower end of the bolt. The upper ends of the bolts extend through sleeves 62 and washers 63 mounted on the brake rin 36. The bolts are provided withspring perches64 screw-threaded thereon and arrangedto engage the lower ends of the springs 46. Adjustment of the tension of the springs is had by varying the positions of the perches 54 on the bolts.

Rotation of the brake ring 36 about the'axis of the post is prevented by means of an extension 68, Fig. l, on the ring carrying a roller 63 positioned in a'ver'tical slot in the bracket 48. Thus, movement of the brake ring heightwise of the frame is permitted, but the roll and slot connection locks the ring against angular movement. p I

The construction and arrangement of the parts are such that, when the presser arm l8 and post l6 are in their uppermost position, the frus toconical member 34 is slightly spaced 'from the frusto-conical surface of the brake ring 36, as shown in Fig. 1. However, when the post is moved downwardly after initiation of a power operation, the member 34 engages the'brake ring 33 which moves downwardly against the pres- After a comparatively slight downward movement of the parts, the increasing spring pressure causes sufiicient friction between the ring 35 and the member 34 to hold the latter against angular movement during further downward movement of the post. Thus, the presser member is constrained to move in a direction normal to the surface of the cutting block l4 during the greater part of its operative movement, and especially during its contact with the work. 'In view of this, there is no tendency to distort or break the cutting edges of the dies which the presser member engages. After completion of the pressure-applying operation, the presser arm [3 and post "5 are returned to their normal position, shown in Fig. 1, and the. upward movement of the brake ring 36 is arrested movement thereof.

by engagement of the ring with the heads of the bolts 54, thus releasing it from the frusto-conical member 34 and thereby freeing the post and. presser arm for angular movement about the axis of the post.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A clicking machine comprising a frame, a cutting bed carried by the frame, a post mounted for reciprocating movement heightwise of the frame and for movement about its axis, a presser arm carried by the post and movable across the cutting bed angularly about the axis of the post, a bracket carried by the frame, a brake ring supported upon the bracket, and a member carried by the post and arranged upon downward movement of the post to engage the brake ring for arresting angular movement of the post and presser arm.

2. A clicking machine comprising a, frame, a cutting bed'carried by the frame, a post mountedfor reciprocation heightwise of thel'frame and for movement'about its axis, a presser arm carried by the post and movable across the cutting bed angularly about the axis of the post, a brake ring surrounding the post and resiliently mounted upon the frame for movement heig'htwise thereof, and a co-operating brake member carried-by the post adapted to engage the brake ring upon downward movement of the post in order to arrest angular movement of the post and presser arm. V

3. A clicking machine comprising .a frame, a cutting bed carried by theframe, a post mounted for'movement'heightwise of the frame and'fo'r angular movement about .its axis, a presser member carried by the post and movable therewith angularly about the axis of the post and toward and away from the cutting bed, and means for arresting angular movement of the post and presser arm upon downward. movement of the post comprising interengaging, brake members, one of which is resiliently mounted upon the frame and the other of which is secured to the post 4. A clicking machine comprising a frame, a cutting bed carried by the frame, a post mounted for reciprocation heightwise of the frame and for angular movement about its axis, a presser arm carried by the post and movable therewith about the axis of the post and toward and away from the cutting bed, a brake ring resiliently mounted upon the frame and having a ifrusto-conical braking surface surrounding the post and spaced therefrom, means engaging the brake ring to hold it against angular movement, and a brake member secured to the post and having a frustoconical braking surface arranged to engage the braking surface of the brake ring upon downward'movement of the post to arrest angular FRANK E. sTRATroN. 

